I was quite surprised that my commenters hadn't heard of MOOCs and I thought it might be helpful to be a bit more specific about places to find them.
My own usual portal is https://www.futurelearn.com/courses/categories. Courses on this site are mostly offered by British Universities although there are a few others. The course I mentioned, "Managing my money" is offered by the Open University and shown on the FutureLearn site. Students are not necessarily UK based - "Nutrition and Wellbeing" which I have just started has students from Australia and New Zealand and doubtless many other countries but it is offered by the University of Aberdeen.
https://www.coursera.org/ is an American based site but trails courses from all over the world - the list of institutions is truly impressive.
MOOCs are also offered for professional development so don't be put off if the first course you click on looks too hard or specialised for you. The various sites cater for all sorts of people and your only real probem is deciding what to do first.
These are high quality courses which, amazingly, are free to use. You won't qualify as a brain surgeon but you will find out more about our world.